Self-contained die set with automatic stamping and/or punching removing means



4 Sheets-Sheet 1 H. TAUSER C. SELF-CONTAINED DIE SET WITH AUTOMATIC STAMPING AND/OR PUNGHING REMOVING MEANS FIG I.

Jan. 11, 1949.

Filed April 21, 1947 INVENTOR'.

His ATTORNEYS.

Muir 27 L V L: ll. M

Jan. 11, 19492 c, TAUSER 2,459,053

SELF-CONTAINED DIE SET WITH AUTOMATIC STAMPING AND/0R PUNGHING REMOVING MEANS 4 Sheets-Sheet 2 Filed April 21, 1947 FI 3. a

HIS ATTORNEYS.

Jan. 11, 1949. c. H. TAUSER 2,459,053

SELF-CON'I'A D -SET WITH TOMATIC STAMPING AN R CHING REM NG MEANS Filed April 21, 1947 4 Sheets-Sheet 3 FIG. 5.

' Has ATTORNEYS.

1949- c. H. TAUSER v ,459,

I SELF-CONTAINED DIE SET WITH AUTOMATIC STAMPING AND/OR PUNCHING REMOVING MEANS Filed April 21, 1947 4Sheets-Sheet 4 FIG. 10. FIG. 8.

| r- I NVEN TO FR' MAM b cwwrw HIS ATTORNEYS.

Patented Jan. 11, 1949 SELF-CONTAINED DIE SET WITH AUTO- MATIC STAMPING AND/OR PUNCHING REMOVING MEANS Charles Henry Tauser, Venita Hark, Mo., .assignor to McDonnell Aircraft Corporation, St. Louis, Mo., a corporation of Maryland Application April 21, 1947, Serial No. 742,946

15 Claims. 1

This invention relates to a self-contained die set and automatic stamping and/ or punching unit of the kind shown in my Patent No. 2,384,708, of September 11, 1945. The present invention has for its principal object to provide, as part of such unit handled die set, a fluid pressure operated mechanism for removing the stampings and/ or punchings therefrom. Another object is to initiate and control the cycle of operations of said means by the movement of the die set. Other objects are cheapness and simplicity of construction, ease of operation and economy of maintenance. Bhe invention-consists in the selfcontained die set and stamping and/ or punching removing unit and in the construction, combinations and arrangements of parts hereinafter described and claimed.

In the accompanyi g drawings, which form .part -.of this specification and wherein like sym- .bols refer to like parts wherever they occur,

Fig, 1 is a .top plan view of a self-contained die set embodying my invention, parts of the punch plate and die plate being shown broken away,

Fig. 2 is a side elevational view of the die set,

Fig. 3 is a horizontal sectional view on the line 33 in Fig. 4,

Fig. 4 is a vertical longitudinal sectional view on the line 4-4 in Fig. 3,

:Fig. 5 is a vertical transverse sectional view on the line 55 in Fig. l,

Fig. -6 is an enlarged fragmentary vertical transverse sectional view on the line 6-6 in Fig. l, the parts being shown in raised or inoperative position,

Fig. 7 is a view similar to Fig. 6, with the parts shown in lowered or operative position,

Fig. 8 is an enlarged fragmentary view, similar to Fig. 3, showing the air motor controlled parts in the positions which they occupy in the inoperative position of the-die set,

Fig. 9 is a fragmentary vertical transverse sectional view on the line S--9 in Fig. .8

Fig. 10 is a view, similar to Fig. 8, with the parts shown in the positions to which they are moved when the die plate reaches the end of its downward travel,

Fig. 11 is a fragmentary vertical transverse section on the line -l-l-l l in Fig. 10,

.Fig. 12 .is an enlarged fragmentary vertical'sec- .tional view on the line 12-12 in Fig. 1,

Fig. 513 is a view-similar to Figs. 8 and 10, showing the position .of the parts when the rack bar reaches the end of its rearward travel,

:Fig. l i is a fragmentary vertical transverse sectional view on the line 14-44 in Fig. .13,

Fig. 15 is a. fragmentary vertical transverse sectional view .on the line 15-45 in Fig. 10,

Fig. 16 is a view similar to Figs. 8, 10 and 13, showing the position .of the parts when the rack bar reaches the end of its forward travel; and

Fig. 17 is a fragmentary vertical transverse sectional view on the line "-41 in Fig. 16.

The self-contained die set and automatic stamping and/tor punching removing assembly shown in the accompanying drawings is adapted for unit mounting on and removal from the bolster (not shown) of a conventional die press immediately below the vertically reciprocatory ram or slide member B thereof. Said die set .unit comprises a substantially rectangular downwardly opening housing .1 having a flat top face .2 and a sharply inclined or beveled end face 3. The housing .1 seats on and is secured by cap screws let to a similarly shaped base or bottom plate lb that closes the bottom of said housing and seats on the bolster .of the die press.

Located above the hollow .body or housing I is a horizontally disposed rectangular .die plate 4; and located above said die plate is a horizontally disposed rectangular punch plate 5 that is provided .on its underside with a suitably shaped blanking punch member 8 adapted for cooperation witha similarly shaped-blanking die opening Fl provided therefor in said die plate. If desired, the punch plate may be provided on its underside with .one or more piercing or perforating punches 8a adapted for-cooperation with similarly shaped die openings .la provided therefor in said die plate. The punch plate 5 is located below the press ram B in position to be engaged by the enlarged lower plate portion 8 thereof when said ram moves downwardly in :the press.

The .die plate .4 and .the punch plate 5 are supported dor independent and joint vertical movement relative to the body I of the die set unit under the downward pressure of the press ram B .by means of upright cylindrical guide posts or leader pins 9 located at the four corners of said body. Each .of these guide posts or leader pins 9 is slidably supported in a cylindrical sleeve 10 which is slidably supported in a bushing ll fixed in a vertical bore [2 provided therefor in the corner of the body The punch plate 5 is secured by means of a countersunk screw 13 to the top of the punch plate supporting post 9; and the die plate .4 seats on the upper-end of the slidable post supporting sleeve 1.8. The post 9 has a stop collar l4 formed integrally therewith adjacent'to the lower end thereof; and :the slidable post supporting sleeve 4.0 has :an outstandingstop flange i5 at the lower end thereof adapted to seat on said stop collar.

Each post 9 and the sleeve I associated therewith is yieldably supported in the vertical bore i2 provided therefor in the body I by means of a coil compression spring I6 located in the lower portion of said bore, with the upper end of said spring seating against the collar (4 on said post and with the lower end of said spring seated on the base plate It) around an upstanding positioning stud I1 fixed thereto centrally of said bore. With this arrangement, the spring I serves to hold the post 9 with its collar I4 against the bottom flange I5 of the sleeve I0 and said flange against the lower end of the sleeve supporting bushing l I fixed in the upper end portion of the vertical bore I2 in the body I.

A rubber spacing collar I8 fits around each post 9 between the die plate 4 and the punch plate 5 and seats on said die plate and is normally spaced below said punch plate. When the punch plate 5 is engaged by the descending ram B of the die press, the punch plate, die plate 4, posts 9 and sleeves I 0 move downwardly together against the pressure of the springs I6 until said die plate seats solidly on the flat top face 2 of the body I, after which the punch plate continues to move downwardly with the posts against such spring pressure to engage the punch elements of the punch plate with the die openings in the seated die plate. During the final downward travel of the punch plate 5, the posts 9 move downwardly in the sleeves I0 and the rubber collars I8 mounted on said posts are compressed vertically between said punch plate and the seated die plate 4. When the press ram B ascends after the punching operation, the punch and die plates are separated by the vertical expansion of the rubber collars I8 and are raised by the springs IB. Non-sticking rubber strips I9 fixed to the underside of the punch plate 5 around the punch elements 6 and 6a. prevent the stock C from lifting with said elements upon the upstroke thereof, following the punching operation.

The stock C, which is shown in the form of a sheet metal strip or plate, is slid in any desired manner between the punch and die plates from the front end of the body I toward the tapering, downwardly inclined rear end 3 thereof; and is guided between rows of upstanding pins 20 fixed to the die plate. When the press ram B descends the plate 8 at the lower end thereof strikes the punch plate 5, thus forcing the punch plate, together with the strip C to be blanked and punched and the die plate 4, downwardly until the die plate seats on the flat top face 2 of the body I, after which the punch plate moves downwardly relative to the die plate and the strip seated thereon to punch a stamping or blank 22 and punchings or slug-s 23 from said strip. When the punch and die plates ascend with the press ram B, the die plate lifts off the flat top face 2 of the body I, carrying with it the punched strip C, while the punch plate 5 is moved upwardly away from the die plate by the expansive action of the rubber collars I8 and the upward travel of the posts 9, the blank or stamping 22 and the punchings or slugs 23 punched from the strip being left below said die plate and lying on the fiat top face of the body.

The above die set unit is provided with means responsive to movement of the die set for automatically removing the stamping 22 and the punching 23 from the flat top surface 2 of the body 4 after each complete operation of the die set. As shown in the drawings, said means preferably comprises a horizontally disposed reciprocating wiper blade or pusher bar 24 that extends crosswise of the die set beneath the die plate 4 and is normally disposed just forward of the front end of the fiattop face 2 of the body of the die set. After each complete operation of the die set, the wiper blade 24 moves rearwardly over the top surface 2 of the body I and pushes the stamping 22 and slugs 23 olf the rear end thereof and then reverses its direction of movement and returns to its original position at the front end of said surface.

In its forward or parked position, the wiper blade 24 is supported on the tops of vertically disposed rest plungers 25, with the lower face of said blade disposed flush with or slightly above the level of the fiat top face 2 of the body I. Each of the rest plungers 25 is slidable in a vertical bore 26 in the top wall of the body I and terminates at its upper end in a head 21 located in a counterbored upper end portion 26a of said bore in position to support the wiper blade 24. The wiper blade rest or supporting plunger 25 extends downwardly through the top wall of the body I and through an opening provided therefor in a retainer plate 28 that is fixed to the underside of said wall by means of cap screws 29. The lower end of the plunger 25 is threaded to receive a nut 30 which is disposed in abutting relation to the underside of the retainer plate 28 and limits the upward travel of said plunger. The plunger 25 is yieldably held in raised position by means of a coil compression spring 3| which is sleeved on the plunger between a shoulder thereon and the bottom of the plunger receiving opening n the retainer plate 28. By this arrangement, when the press ram B moves downwardly, the parked wiper blade supported on the springsupported plungers 25 is adapted to move downwardly with the plungers below the level of the flat top face 2 of the body I.

The wiper blade 24 extends on opposite sides of the body I of the die set and has its ends connected to the horizontal top stretches of endless sprocket chains 32 that extend lengthwise of said body along said sides thereof. Each of the sprocket chains 32 is supported at its forward end on an idler sprocket wheel 32a that is journaled on a horizontal stud 33 that is secured by nuts 33a to the vertical wall of a supporting bracket 34 having an inwardly facing circular rccess adapted to receive the outwardly facing hub portion of said sprocket wheel. The sprocket wheel 32a is spaced from the body I by means of a head 33!) on the inner end of the stud 33 and a washer 35 mounted around said head. The bracket 34 has a rearwardly extending threaded stem portion 36 that is slidably supported in a horizontal bore in a block 3! fixed to the side of the body I. The threaded stem portion 36 of the bracket 34 is provided at opposite ends of the bore provided therefor in the supporting block 31 with nuts 38 which abut against said block and constitute means for adjusting the sprocket wheel 32a, lengthwise of the chain 32 to properly tension the same. The sprocket chain 32 is supported at its rear end on an idler sprocket wheel 39 that is journaled on a stud 40 that is threaded into the adjacent side of the body I. The sprocket wheel 39 is retained on the stud 40 by means of a head 4| at the outer end thereof and is spaced from the body I by means of a washer 42 sleeved on said stud between said wheel and body.

S chains 32 are aointly operated in one direction to move the wipa blade 24 real'wardly over the flat top face 2 of the :body 1 and in a reverse direction to return said blade to its parked or inoperative position. The driving means for the sprocket "chains 32 comaconventional air or fluid pressure motor or engine It which is secured byeap screws 44 to the base or bottom closure plate 11) for theh'olloware journaled in bearings 53 seated on and .se

cured to the :base plate lb. The side walls of the body i are matched, as at 54, to straddle the sprocket shaft bearings 53 and the sprocket shafts .52 are provided at their outer ends with sprocket Wheels 55 which mesh with the lower stretches of the respective sprocket chains. The air motor 43 is of the conventional self-reversing type having a housing 66 atone end thereof containing a valve mechanism (not shown) which admits air into the cylinder through a supply pipe and forces the piston towards the opposite end of said motor and automatically reverses the piston when it reaches-the end of its initial stroke.

This air inlet and reversing valve mechanism ineludes a normally closed air inlet valve having a plunger '58 which projects horizontally from one side of the valve housing 56 of the air motor '43. The mechanism for depressing the inlet valve plunger 58 to start the operation of the wiper blade operating air motor or engine 43 comprises adepressible opera-ting plimger 59 that is axially slidable in a bushing 60 fixed in a vertical bore provided therefor 'in the top wall of the body 1 forward of the parking position'of the wiper blade 2d. The opera-ting plunger 59 has a headed upper end portion El and is supported for downward yielding movement in the bushing '50 by means of a coil compression spring 62 :sleeved on said pin between the head thereof and the bottom of said bushing. The operating plunger 59 extends downwardly through the bottom of the :bushing 50 and has an extension 59a. threaded on its lower end for varying the length -of said plunger. The operating plunger 59 has a .lock nut =53 threaded thereon in abutting relation to the extension "5941 thereof; -and this nut abuts against the bottom of the bushing 60 and limits the upward movement :of said plunger under the influence of the supporting :spring 32 therefor. The nut 53 serves to normally hold the plunger 5'9 with its head slightly below the die plate 4 in the raised or inoperative position of the latter. Located below the operating plunger 59 in axial alinem'ent therewith is a lock plunger "64 which is mounted for axial sliding movement in a vertical bore provided therefor in a block 65 that seats on and is rigidly secured to the base or cover plate th for the bottom of the main housing :I of the die set. The lock plunger :6! is supported on a coil compression spring '66 located in the vertical bore provided for said plunger in the block 65. The'lock plunger 6 has an annular zp'eripheral groove '61 therein 'near the upper end thereof and the block has a horizontal bore 58 therein which communicates with the lock plungor supporting bore lthereot A loci; pin 69 has end supported in the horizontal bore 68 for axial sliding movement therein into and out of the annular groove '61 in the lock plunger '84 when the latter is depressed for enough to bring said groove opposite said pin. In the raised position of the lock plunger t4, the annular peripheral groove 61 thereof is located above the level of the horizontal stop pin 59 and said plunger serves to hold said pin clear of the plunger -supporting bore. The opposite end of the horizontal :stop pin 59 is :slidably supported on the upstanding flange of an angle shaped bracket 10 that is secured to the base plate la.

mi upright arm 14 is pivotally supported at its lower end ou a pin 12 journaled in lugs 13 that pmfiect from the block $5 below the stop pin -59 supported therein. The stop pin 69 extends through an opening 1-4 in said arm and has :a cross pin 15 fixed thereto whose opposite ends are disposed in elongated upright slots 1'8 provided therefor in said arm 'on opposite sides of said opening. A coil compression spring 1 l is sleeved around the stop pin '69 between the supporting bracket 10 therefor and serves to swing the arm lil in a direction that will slide said stop pin into the annular groove 16:! in the lock plunger 64 when the latter is depressed far enough to bring :said groove opposite the forward or working end of said stop pin.

Located adjacent to t-he axially alined operating plunger 58 and lock plunger 64 is a lever 18 which is journaled for horizontal swinging movement on a vertical stud 1 9 that is fixed to a block 86 that :seats on and is secured to the base :or cover plate to. The lever 76 :has one arm 8'! that extends across the lock plunger supporting .blook $5 between the lock plunger 54 and the upright :stop pin actuating arm H and is slidable on the horizontal top face of said :block. The arm .81 of the lever 1:8 has a stud '82 projecting horizontally therefrom on the side thereof which faces the pivoted upright :arm TH, which arm is yieldably held in engagement with the outer end of said stud by means of the coil spring '17. The stud-82 is threaded into the :arm 8| 'of the lever 18 for axial adjustment relative thereto and locked .in 'thedesired positionof axial adjustment by means of a lock nut 3. The other side of the arm 8:! of the lever 18 .is milled longitudinally to provide horizontally ofiset upper and lower side faces :84 and 85, respectively. 'In the raised position of the lock plunger 64, the lower or forward .side face 85 :of the lever arm 8! is adapted t0 abut against the upper end of said plunger, and in the-depressediposition of said lock plunger the face "85 of said lever arm is adapted :to abut :against the lower :end 1590. of the operating plunger 59. A .coil tension spring 86 has one end fixed to an anchor stud 81 :secured to the base plate lb and the other end' secured to the outer end of the other arm 38 of the lever so as to urge said lever in a direction that will swing the arm 81 thereof in the direction of the vertical axes of the operating plunger 59 and lock plunger 84.

A .lever 89 is also journaled on the pivot stud .18 for horizontal swinging movement towards and away from the arm 83 of the lever 18 and the valve plunger 58 for starting and stopping the operation of the air motor '43. The lever '89 has one arm 90 in position tobe operated by the arm 88oif the lever '18 also journaled'on-said-stud; and the {other arm 9 'of the lever 439 is adapted to 75 engage the valve plunger 58 to depress *the same.

The lever 89 is adapted to be locked in its valve plunger operating position by means of an arm .92 pivotally secured, as at 93, for vertical swinging movement in a groove 94 in the top of the block 80. The lock arm is supported at its free end on a coil compression spring 95 that is adapted to hold said end of said arm in endwise abutting relation to the arm 9| of the lever 89 on the side of said arm remote from the valve plunger operating face thereof. The upward swinging movement of the lock arm 92 is limited by means of a pin 95 that is fixed in the block 80 crosswise of the groove 94 therein and extends through a circular opening 97 provided therefor in said lock arm.

The lock arm 92 is swung downwardly against the pressure of its supporting spring 85 so as to bring the free end of said arm below the level of the arm 9| of the lever 89, by means of a sleeve 98 fixed to a horizontal slide rod 99 that extends crosswise of said lock arm above the top thereof. The rod 99 is supported for axial sliding movement in suitable bearings I fixed to the base plate Ib; and the sleeve 98 on said rod has a conical end portion or cam 98a adapted to engage the top of the lock arm 92 and swing the same downwardly against the pressure of the supporting spring 95 therefor. The slide rod 99 is arranged with its forward end in position to cooperate with the rear side of the arm 88 of the lever I8; and said rod extends rearwardly above the rack driven across shaft 48 with its rear end in position to be engaged by one arm of a trip lever IOI that is journaled for horizontal swinging movement on a vertical pivot stud I02 fixed to a block I03 that seats on and is secured to the base plate lb. The other arm of the trip lever |0I is disposed opposite the rear end of the rack 45 and is provided with a pin I04 having a head I05 that faces said head end of said rack for engagement thereby as it nears the end of its rearward travel. The pin I04 is threaded through the trip lever HM and is provided with lock nuts I08 for locking the pin in the desired position of axial adjustment in said lever. A coil compression spring I0! is sleeved on the slide rod 99 with one end seated against the rear face of the forward bearing I00 therefor and with the other end bearing against a collar I 08 fixed to the said rod rearwardly of said hearing. The spring I01 holds the rear end of the slide rod 99 against the trip level II and normally holds the front end of said rod clear of the arm 88 of the lever I8.

In the inoperative position of the die set, the die plate 4 and the axially alined operating plunger 59 and lock plunger 84 are fully raised with the upper end of said operating plunger just clear of the underside of said die plate and with the lower or forward side face 85 of the arm SI of the lever "I8 abutting against the upper end of said lock plunger and with the arm 90 of the lever 89 held in sidewise abutting relation to the arm 88 of the lever 78 by the pressure of the valve plunger 58 of the air motor 43 on the other arm 9| of the lever 89. In this position of the parts, the stud 82 on the arm 8| of the lever 18 abuts against the upright pivotal arm II and thus holds the horizontal stop pin 69 clear of the lock plunger 84, the free end of the spring supported lock arm 92 is disposed in inoperative position beneath the arm SI of the lever 89, and the slide rod 99 is forced rearwardly under the action of the spring I01 so as to hold the cam sleeve 98 on said rod clear of said lock arm and the rear end of said rod 8 in abutting relation to the trip lever IM and the pin I04 thereon in its forward position.

In operation, when the die plate 4, just before seating on the flat top face 2 of the body I, strikes the operating plunger 59 and forces it downwardly, this downward movement of the operating plunger also forces the lock plunger 64 located directly therebelow downwardly, thereby bringing the annular groove 6! in said lock plunger opposite the adjacent end of the horizontal lock pin 59. The lower end portion 59a of the operating plunger 59 is of smaller diameter than the diameter of the upper end portion of the lock plunger 54 so that, when the upper portion of said lock plunger moves downwardly clear of the arm 8| of the lever I8, the lower or forward side face of said arm is engaged by the tension spring 86 with said lower end portion of said operating plunger, thereby permitting the spring-pressed upright pivotal arm II to move with the stud 82 carried by the lever arm 8! far enough to shift the stop pin 88 into the annular groove 6'! in said lock plunger and thus lock the latter in depressed position.

As, the die plate 4 completes its downward stroke and begins to ascend, the operating plunger 59 also ascends under the action of its supporting spring 62. During the up-stroke of the operating plunger 59, the lever 18 is prevented from pivoting by the lower end of s id plunger until the bottom end thereof passes above the lower or forward side face 85 of the arm 8| of said lever. The tension spring 88 then swings with the lever 18 in a direction that will engage the upper arm 88 of said lever with the arm 90of the lever 88 and force the arm 9E thereof into engagement with the valve plunger 58 of the air motor 43, thus admitting air into said motor and impart-ing a rearward stroke to the piston therein. This movement of the lever 18 relieves the upright arm 1| of the pressure of the stud 82 carried by said lever. thereby permitting said arm to fully seat the stop pin 59 in the annular groove 8! in the depressed lock plunger 54. During the valve open-ing movement of the lever 89, the valve plunger operating arm 9| thereof moves clear of the free outer end of the lock arm 92, which then swings upwardly into abutting relation to said arm and locks said lever in valve operating position.

The rearward movement of the air motor piston causes the rack 46 carried thereby to rotate the pinion 41 fixed to the cross shaft 48 and the cross shaft to operate the two sprocket chains 3| through the gears 50 and 5| and driving sprocket wheels 55 in a direction that will cause the upper stretches of said sprocket chains to move rearwardly. This rearward movement of the upper stretches of the sprocket chains 32 causes the wiper blade 24 carried thereby to travel therewith rearwardly along the top face 2 of the body and push the blank 22 and punchings 23 off the downwardly sloping rear end 3 of said body. Just before the gear rack 46 has completed its rearward stroke, it strikes the pin I04 on the trip lever |0I and swings said lever in a direction that will slide the slide rod 89 forwardly and cause the cam sleeve thereon to ride over the lock lever 92 and swing the same downwardly clear of the arm 9| of the lever 89, thereby unlocking the latter and releasing the plunger 58 of the air valve mechanism of the air motor 43 and reversing the stroke thereof and the movement of the sprocket chains 32 and returning the Wiper blade carried thereby to parking position.

As the slide rod 99 nears the end of its forward sliding movement, the forward end thereof strikes the arm 88 f the lever 18 and swings the arm 8! of said lever clear of the lower end 59a of the raised operating plunger 59. This pivotal movement of the lever 18 causes the stud 82 on the arm 8! thereof to swing the upright arm 'H against the pressure of the spring 14 and thus shift the locking pin 69 in a direction that will move it clear of the annular groove 61 in the depressed lock plunger 64, thereby permitting said lock plunger to rise under the action of its supporting spring '56. When the rack 46 starts its return movement, it releases the trip lever HH, thereby permitting the spring 101 to return the slide rod 99 and trip lever to normal position and the spring 88 to swing the lever 18 into its original position with the lower or forward side face 85 of the arm 81 thereof abutting against the upper end of the raised lock plunger 64.

Obviously, the hereinbefore described self-contained die set and wiper assembly admits of considerable modification Without departing from the invention. Therefore, I do not wish to be limited to the precise construction shown and described.

What I claim is:

l. A die set comprising relatively movable punch and die members, means for removing from said die set stampings or punchings p duced thereby, said means including a member having an operating cycle comprising a move ment of said member from one end of said die set to the opposite end thereof and a return movement of said member to said first mentioned end after each complete operation of said die set, and fluid pressure operated means mounted in said die set and controlled by the movement thereof for imparting one complete operating cycle to said member after each complete opera tion of said die set.

2. A die set comprising relatively movable punch and die members, and means for removing from said die set stampings or punchings produced thereby, said means including a pusher element adapted to move from parking position at one end of said die set to a position at the opposite end thereof and reverse its direction of movement and return to such parking position, and a fluid pressure actuated piston mounted in said die set and controlled by the movement thereof for imparting the aforesaid movement to said pusher element after each complete opera.- tion of said die set.

3. A die set comprising a body, punch and die members located thereabove for vertical movement relative thereto and to one another, and means for removing from the top of said body stampings or punchings produced by said punch and die members, said means including a wiper member movable over the top of said body, a reciprocable fluid pressure actuated piston mounted in said body and adapted in one direction of its reciprocating movement to move said wiper member from a parking position at one end of said body to a position at the opposite end thereof and in the other direction of its reciprocating movement to return said wiper member to parking position, and means controlled by the movement of said die set for bringing said piston into opera tion after each complete operation of said die set.

4. A die set comprisin a body, superimposed punch and die members mounted above said body for vertical movement relative thereto and to each other, endless sprocket chains extending along opposite sides of said body, a wiper member secured to corresponding stretches of said sprocket chains for movement therewith over said body to remove from the top thereof stampings and punchings produced by said die set, a fluid pressure cylinder mounted in said body for operating said sprocket chains in one direction to move said wiper member from a parking position at one end of said body to a position at the opposite end thereof and in a reverse direction to return said Wiper member to such parking position, control means for said fluid pressure cylinder, and means operated by the movement of said die set for operating said control means after each complete operation of said die set.

5. A die set comprising a body, vertically movable punch and die members located above said body, a pair of sprocket chains extending along two opposite sides of said body, a wiper member secured to said sprocket chains for movement thereby over said body to remove therefrom stampings or punchings produced by said punch and die members, a fluid pressure actuated piston reciprocable in said body and operatively connected to said sprocket chains, whereby a forward and reverse movement is imparted to said sprocket chains and the wiper member secured thereto by each complete reciprocation of said piston, control means for said piston, and means operated by the movement of said die set after each complete operation thereof for actuating said control means.

6. A die set comprising a body, a superimposed punch and die members mounted above said body for vertical movement relative thereto and to each other, endless-sprocket chains extending horizontally along opposite sides of said body, a wiper member secured to the upper stretches of said sprocket chains for movement thereby across the top of said body for removing therefrom stampings and punchings produced by said punch and die members, sprocket wheels cooperating with the respective sprocket chains for driving the same, gearing for driving said sprocket wheels, a fluid pressure actuated piston having a gear rack cooperating with said gearing for driving the same, whereby one complete reciprocation of said piston moves said wiper member from a parking position at one end of said body to a position at the opposite end thereof and returns said wiper member to such parking position, and means controlled by the movement of said die set for bringing about one complete reciprocation 01" said piston after each complete operation of said die set.

7. The combination set forth in claim 6 wherein said gearing and piston are enclosed in achamber provided therefor in said body.

8. The combination set forth in claim 6 wherein said body has a chamber therein opening through the bottom thereof, a plate is secured to the bottom of said body for closin said chamber and said sprocket wheels, gearing and piston are mounted on said plate and said gearing and piston are enclosed in the chamber closed by said base plate.

9. A die set comprising a body, vertically movable punch and die members located above said body, a pair of sprocket chains extending along two opposite sides of said body, a wiper member secured to said sprocket chains for movement therewith over said body to remove therefrom stampings or punchings produced by said-punch and die members, a fluid pressure actuated piston operatively connected to said sprocket chains for imparting a forward and reverse movement thereto and a forward and return movement to said wiper member, control means for said piston, and means operated by the movement of said die set for actuating said control means to impart one complete reciprocation to said piston after each complete operation of said die set.

10. A die set comprising relatively movable punch and die members, a wiper member for removing from said die set stampings or punch ings produced thereby, a fluid pressure cylinder, a piston working in said cylinder and operatively connected to said wiper member for imparting a reciprocating movement thereto, a normally closed valve for admitting fluid pressure to said cylinder to actuate the piston therein, and means controlled by the movement of said die set for opening said valve after each complete operation of said die set.

11. A die set comprising relatively movable punch and die members, a Wiper member for removing from said die set stampings and punchings produced thereby, a fluid pressure cylinder, a piston working in said cylinder and operatively connected to said wiper member for imparting a reciprocating movement thereto, a normally closed valve for admitting fluid pressure to said cylinder to reciprocate the piston therein, means operated by the movement of said die set for opening said valve after each complete operation of said die set, and means operable by the movement of said piston to release said valve closing means and thus stop said piston after one complete reciprocation thereof.

12. A die set comprising relatively movable punch and die members, a wiper member for removing from said die set stampings and punchings produced thereby, a fluid pressure cylinder, a piston working in said cylinder and operatively connected to said wiper member for imparting a reciprocating movement thereto, a self-closing valve for admitting fluid pressure to said cylinder to actuate the piston therein, and means operated by the movement of said die set for opening said valve after each complete operation of said die set and for closing said valve after one complete reciprocation of said piston, said means including a lever engageable with said valve for opening the same, a member for 1ocking said lever in valve opening position, and means operable by the movement of said piston to release said lever locking member and thus stop said piston after one complete reciprocation thereof.

13. A die set comprising relatively movable punch and die members, a wiper member for removing from said die set stampings and punchings produced thereby, a fluid pressure cylinder, a piston working in said cylinder and operatively connected to said wiper member for imparting a reciprocating movement thereto, a self-closing valve for admitting fluid pressure to said cylinder to actuate the piston therein, and means operated by the movement of said die set for opening said valve after each complete operation of said die set and for closing said valve after one complete reciprocation of said piston, said means including a lever for opening said valve, a second lever for moving the valve actuating lever to valve opening-position, a member for locking said valve actuating lever in valve opening position, and means movable with said piston and operable to release said lever locking member and said second lever to thereby permit said valve to close and stop said piston after one complete reciprocation thereof.

14. A die set comprising vertically movable punch and die members, a Wiper member for removing from said die set stampings and punchings produced thereby, a fluid pressure cylinder, a piston working in said cylinder and operatively connected to said wiper member for imparting a horizontally reciprocating movement thereto, a self-closing valve for admitting fluid pressure to said cylinder for reciprocating the piston therein, and means operated by the movement of said die set for opening said valve after each complete operation of said die set, said means including a lever for opening said valve, a second lever for moving the valve actuating lever to valve opening position, a member for locking said valve in valve opening position, and means operable by the movement of said piston for releasing said lever locking member and said second lever to thereby permit said valve to close.

15. A die set comprising vertically movable punch and die members, a wiper member for removing from beneath said members stampings and punchings produced thereby, a fluid pressure cylinder, a piston working in said cylinder and operatively connected to said wiper member for imparting a horizontally reciprocating movement thereto, a self-closing valve for admitting fluid pressure to said cylinder for reciprocating the piston therein, and means operated by the movement of said die set for opening said valve after each complete operation of said die set, said means including a first lever 'for opening said valve, 2. spring-actuated second lever for moving said first lever to valve opening position, a member for locking said first lever in valve opening position, a lower spring-supported plunger normally holding said second lever in inoperative position, an upper spring supported plunger operable by the downward movement of said die member to move said lower plunger downwardly clear of said second lever and to hold the latter in an inoperative position relative to said first lever while permitting limited movement of said second lever in an operative direction, a member releasable by such limited movement of said second lever for locking said lower plunger in down position, said upper plunger being adapted to move upwardly when said die plate ascends and thereby permit said second lever to move said first lever to valve opening position, and means operable by the movement of said piston for releasing said first lever locking member and for returning said second lever to inoperative position, said return movement of said second lever permitting said lower plunger locking member to return to inoperative position and said lower plunger to return to its position for holding said second lever in inoperative position.

CHARLES HENRY TAUSER.

REFERENCES CITED UNITED STATES PATENTS Name Date Tauser Jan. 11, 1944 Number 

